CN107100092A - The quick bridge widening structure and installation method of a kind of uninterrupted traffic - Google Patents
The quick bridge widening structure and installation method of a kind of uninterrupted traffic Download PDFInfo
- Publication number
- CN107100092A CN107100092A CN201710360368.2A CN201710360368A CN107100092A CN 107100092 A CN107100092 A CN 107100092A CN 201710360368 A CN201710360368 A CN 201710360368A CN 107100092 A CN107100092 A CN 107100092A
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- Prior art keywords
- bracket
- crossbeam
- diagonal brace
- fixed
- web member
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a kind of quick bridge widening structure of uninterrupted traffic, including：Crossbeam, bracket, diagonal brace, web member, beam bottom steel plate, longeron, floorings, the bracket is located on the outside of pontic girder web plate, flange plate bottom, it is outstanding beyond pontic flange plate width, between the bracket and girder, between the bracket and crossbeam, between the bracket and diagonal brace, it is fixed between the diagonal brace and crossbeam；The web member is located between the Liang Yuliang of pontic, and is fixed with the web of beam, intersects web member and is fixed in crosspoint；Beam bottom steel plate is fixedly connected with beam bottom；The longeron is located on crossbeam, fixed floorings above longitudinal and cross beam.The bridge widening structure that the present invention is provided reduces the substructure of newly building bridge, modified difference produces problems of crack to connecting the Effect on Mechanical Properties of armored concrete, connecting portion concrete between avoiding new and old bridge, solves the problems such as work progress need to interrupt existing traffic.
Description
Technical field
The present invention relates to road and bridge engineering technical field, more particularly, to a kind of quick bridge widening structure of uninterrupted traffic
And installation method, it is adaptable to the volume of traffic is big and is difficult to suspend traffic and is not suitable for increasing the bridge of substructure.
Background technology
At present, with the high speed development of social economy, urban road scale constantly expands, what quite a few early stage built
Bridge technology situation does not adapt to new trip demand, and generally existing communication function is weak, the low problem of the traffic capacity,
" bottleneck " is formed in urban road network, the unimpeded of urban transportation has been had a strong impact on, it is multiple as traffic jam point and traffic accident
Place.With reference to urban infrastructure construction, urgent need undergoes technological transformation to it, rationally utilizes, to meet and adapt to new traffic
Development need.
In bridge Reconstruction Project, bridge widening technical sophistication, enforcement difficulty are high, influence big to Modern Traffic, Yi Jiru
What ensures to widen the overall good operative performance of back axle girder construction.For such a problem, need badly and use a kind of economical rationality and fast
The bridge widening structure of speed.Being set at original beam bottom at steel construction, cantilever sets steel truss to connect, and transverse direction is set up between Liang Yuliang
Diagonal brace, horizontal diagonal brace is connected the rigidity for improving cantilever with steel truss, so can not only quickly carry out bridge widening, and do not influence
Passed through on bridge and under bridge, also reduce newly building bridge substructure, make full use of the bearing capacity of existing highway bridge.
In recent years, bridge Reconstruction Project is fast-developing, extensive application of the structural steelwork in bridge structure, therefore,
Widening and improving is carried out to existing highway bridge by using steel construction, newly building bridge substructure is on the one hand reduced, can quickly apply
Work；On the other hand uninterrupted traffic is gone back.So far, there is not yet the structure to be directly applied to the report of bridge widening.
At present, common bridge widening mode is that newly-built superstructure and substructure, newly-built in Yuan Qiao one or both sides
Bridge superstructure is connect with former bridging, and substructure is separated with former bridge, and this mode quantities is big, while top and the bottom structure is applied
Work, can also on bridge cut-off or traffic under bridge, and newly building bridge and original Bridge Foundation are separated, and differential settlement can cause coupling part
Deformation is ftractureed.
The content of the invention
In order to solve present in prior art modified difference between new and old bridge to connecting the mechanical property of armored concrete
Influence, connecting portion concrete produce the problems such as problems of crack and work progress interruption existing traffic, the invention provides
A kind of quick bridge widening structure of uninterrupted traffic, including：
Crossbeam, bracket, diagonal brace, web member, beam bottom steel plate, longeron, floorings, wherein：
The bracket is located on the outside of pontic girder web plate, and flange plate bottom is outstanding beyond pontic flange plate width, institute
State between bracket and girder, between the bracket and crossbeam, between the bracket and diagonal brace, carried out between the diagonal brace and crossbeam
It is fixed；The web member is located between the Liang Yuliang of pontic, and is fixed with the web of beam, intersects web member and is fixed in crosspoint；Institute
Beam bottom steel plate is stated to be fixedly connected with beam bottom；The longeron is located on crossbeam, fixed floorings above longitudinal and cross beam.
It is preferred that, the bracket is fixedly connected by bar planting with girder, and smearing structure between the bracket and girder
Glue.
It is preferred that, between the bracket and crossbeam, between the bracket and diagonal brace, pass through weldering between the diagonal brace and crossbeam
Connect fixation.
It is preferred that, the web member is fastened by the web of crab-bolt and end plate and beam, intersects web member logical in crosspoint
Cross and be welded and fixed.
It is preferred that, beam bottom steel plate is connected by bar planting with beam bottom, and the smearing structure glue between girder.
It is preferred that, the crossbeam, bracket, diagonal brace, web member, longeron use channel-section steel or i-steel component.
The installation method of the quick bridge widening structure of above-mentioned uninterrupted traffic：
(1) preparation：Take down the old bridge anticollision barrier, and cut the part edge of a wing and mat formation；
(2) drill：Using impact drill in embedded crab-bolt and the position drilling of bar planting, Kong Houyong compressed airs blowout hole is drilled
Interior dust, then it is stained with absorbent cotton alcohol or acetone cleans hole inwall；
(3) bar planting：Anchoring adhesive is completely noted in hole, then crab-bolt and bar planting are unidirectionally screwed in；
(4) web member is installed：End plate is inserted in crab-bolt, nut is tightened and fixes, be then welded and fixed web member with end plate；
(5) affixing steel plate：Full coat structure glue, is inserted in bar planting between beam bottom steel plate and beam contact surface, tightens bolt and fixes；
(6) crossbeam and diagonal brace are installed：Bracket, crossbeam and diagonal brace tighten together using being welded to connect, bracket are connect with beam
Full coat structure glue between contacting surface, is inserted in bar planting, tightens bolt and fixes, and bracket bottom is fixed together by welding with beam bottom steel plate；
(7) longeron and floorings are installed.
The present invention widens old bridge using steel truss widened structure, with advantages below：
1st, steel truss structure is connected integral with old bridge superstructure, can the new and old common stress of bridge, reduce because of bottom
Structure is separated and the sedimentation of generation, deformation.
2nd, when steel truss is constructed, the influence to former bridge traffic can be reduced to greatest extent, and the current of former bridge is not interrupted,
Only in old bridge side and bottom construction, it is necessary to which construction space is small.
3rd, steel member can be prefabricated with batch production, and quality guarantee rate is high, eliminates concrete construction formwork supporting plate, ties up reinforcing bar, pours
The link such as build and conserve, easy construction, speed is fast.
Brief description of the drawings
Fig. 1 is the side view of steel truss widened structure of the present invention.
Fig. 2 is the plan of widened structure of the present invention.
Fig. 3 is the drawing of affixing steel plate of the present invention.
Fig. 4 is outside diagonal web member Stability Checking Calculation figure.
Description of reference numerals：
Crossbeam -1, bracket -2, diagonal brace -3, web member -4, end plate -5, crab-bolt -6, beam bottom steel plate -7, bar planting -8, longeron -9,
Floorings -10, old bridge side bar -11, old bridge central sill -12, widened structure-A, Jiu Qiao-B.
Embodiment
Below by specific embodiment, the present invention will be described, but the invention is not limited in this.
The invention provides a kind of steel truss widened structure for being used to widen old bridge, including crossbeam 1, bracket 2, diagonal brace 3, abdomen
Bar 4, end plate 5, crab-bolt 6, beam bottom steel plate 7, bar planting 8, longeron 9, floorings 10 etc..
Bracket 2 is located at old bridge side bar web outside flange plate bottom, and beyond old bridge flange plate width.Bracket 2 is by planting
Muscle 8 is connected with beam, and smearing structure glue between bracket 2 and beam, crossbeam 1 is welded and fixed together with bracket 2, diagonal brace 3 and crossbeam 1,
Bracket 2 is by being welded and fixed.
Web member 4 between described old bridge and beam is tightened together by crab-bolt 6, end plate 5 with the web of beam, two
Passing crosswise between web member is welded and fixed.
Described beam bottom steel plate 7 is connected by bar planting 8 with beam bottom, interstitital texture glue between beam bottom steel plate 7 and beam.
Described longeron 9 is located on crossbeam, installs floorings on beam in length and breadth.
The crossbeam 1, bracket 2, diagonal brace 3, web member 4, longeron 9 can be using shaped steel such as channel-section steel, I-steel.
Structure Calculation is carried out first：
First, primary structure is checked
Due to adding multiple tracks diaphragm, in order to be able to relatively accurately reflect the stressing conditions of practical structures, such knot
Structure is reduced to the beam lattice system intersected in length and breadth, is solved by the space structure of system of bars.It is external load by the masterpiece of widened structure
It is carried on former bridge.
1st, outside diagonal web member Stability Checking Calculation
Diagonal web member is rigid connection with floorings and web, and when bearing the load of floorings transmission, diagonal web member can be sent out in itself
Compression and vertical rod are given birth to deformation.Sudden destruction, that is, de-stabilise destruction can occur when transversely deforming is larger.Ginseng
See Fig. 4, depression bar balance differential equation is as follows：
EI μ "=- N μ-F (l-x)-M (1)
EI μ=∫ ∫ (- N μ-F (l-x)-M) d μ d μ+C μ+D (2)
Solve the differential equation and obtain general solution：
Known boundaries condition：X=0 μ=0；X=0 μ=0.Compression is disregarded in end to stable influence, is only included in
Depression bar transversely deforming, it can thus be concluded that strut buckling stressing conditions.
2nd, bar planting Strength co-mputation
Outer beams are attached with bracket by bar planting in the present invention, and steel plate and concrete component are realized by shear reinforcement
It is common to cooperate.Stress is very multiple in shear connector and its surrounding concrete plate, and connection Ultimate Strength Calculation formula is as follows：
QuIt is ultimate bearing capacity；fcIt is the cubic compressive strength of concrete；f'cIt is concrete cylindrical compression strength；fy
It is the yield strength of reinforcing bar；D is hole diameter；dsIt is the diameter of lateral direction penetrating reinforcing bar；
3rd, side bar is checked
Floorings after widening, make mutually what is be hinged with former bridge flange plate, calculate the stress of former bridge side bar cantilever root,
Worst loading position is that wheel load centering is arranged in hinged place.
The moment of flexure of every meter of wide lath：
Msp：Mobile load moment of flexure, Msg：Dead load moment of flexure, Ms：Design maximum moment of flexure, a:The effective work width of cantilever slab,
μ：Impact coefficient.
Go out the shearing of every meter of wide lath：
Cantilever slab bearing capacity presses current specifications《Highway reinforced concrete and prestressed concrete bridge contain design specification》JTG
D62-2004 opposite side girder cantilever plates are checked.
Multiple tracks diaphragm is added, makes main beam stress evenly, in order to be able to relatively accurately reflect the stress of practical structures
Situation, the beam lattice system that this class formation is reduced to intersect in length and breadth, is solved by the space structure of system of bars.By widened structure
Masterpiece is that external load is carried on former bridge.The bearing capacity of the former bridge girder of checking computations, meets after current specifications requirement, can use this
Structure is widened.
2nd, widened structure is checked
Widened structure stress is mainly born by crab-bolt, is primarily subjected to shearing and moment of flexure, is calculated the shearing of crab-bolt：
V=q1l1+q2h (7)
q1：The horizontal severe per linear meter(lin.m.), q2：The vertical severe per linear meter(lin.m.), l1：The width widened, h：Girder height
Then moment of flexure is calculated
M=V (l1+l0)/2 (8)
Group's anchor carries out forcing checking under shearing and Moment, and according to calculate reasonable structure design crab-bolt bore dia,
The parameters such as drilling depth.
Shown according to many Short/Medium Span Bridge result of calculations, on the premise of original bridge meets requirement, this kind of structure
Width can accomplish that 2.5m is wide.
Form 1
The widened structure work progress that the present invention is provided is as follows
(1) preparation
Take down the old bridge anticollision barrier, and cut the part edge of a wing and mat formation.This is widened transversary and staggered old bridge diaphragm plate arrangement,
According to old bridge size and structure across footpath, arrangement spacing is calculated.Need to carry out repetition measurement to ready-made size before steel construction processing and fabricating, it is ensured that
Machining accuracy.
(2) drill
Crab-bolt 6, the drilling of the position of bar planting 8 are buried in steel truss, the impact drilling can be used, girder should be avoided during drilling and in advance should
Power muscle and cage bar.It is drilled dust in Kong Houyong compressed airs blowout hole, then is stained with absorbent cotton alcohol or acetone cleans hole inwall.
(3) bar planting
Anchoring adhesive is completely noted in hole, then crab-bolt 6, bar planting 8 are slowly unidirectionally screwed in, can not inversely be inverted halfway, until
Reinforcing bar stretches into bottom hole.Crab-bolt 6, bar planting 8 treat that it is fully cured after being implanted into, and can carry out next procedure.
(4) web member is installed
End plate 5 is inserted in crab-bolt 6, nut is tightened and fixes, then lifts web member to correct position, respectively with end plate
It is welded and fixed.
(5) affixing steel plate
Beam bottom steel plate answers full coat structure glue with beam contact surface, is inserted in bar planting, tightens bolt and fix.
(6) crossbeam and diagonal brace are installed
Bracket, crossbeam and diagonal brace are tightened together using being welded to connect.Bracket and beam contact surface are answered into full coat structure glue,
Bar planting is inserted in, bolt is tightened and fixes.Bracket bottom is fixed together by welding with beam bottom steel plate.
(7) longeron and floorings are installed
Widened structure is installed after stabilization, is carried out loading test and is met after requirement, installs longeron and floorings.
The quick bridge widening structure that the present invention is provided can be constructed in the case of uninterrupted traffic, the bridge widening
Structure reduces the substructure of newly building bridge, it is to avoid modified difference is to connecting the mechanical property of armored concrete between new and old bridge
It can influence, connecting portion concrete produces problems of crack, solves the problems such as work progress need to interrupt existing traffic.
It is understood that above is in order to illustrate the principle of the present invention and the example of exploitativeness, not office of the invention
It is limited to this.For those skilled in the art, without departing from the spirit and substance in the present invention, can be with
All variations and modifications are made, these variations and modifications are also considered as protection scope of the present invention.
Claims (7)
1. a kind of quick bridge widening structure of uninterrupted traffic, including：It is crossbeam, bracket, diagonal brace, web member, beam bottom steel plate, vertical
Beam, floorings, it is characterised in that：
The bracket is located on the outside of pontic girder web plate, and flange plate bottom is outstanding beyond pontic flange plate width, the support
Between frame and girder, between the bracket and crossbeam, between the bracket and diagonal brace, consolidated between the diagonal brace and crossbeam
It is fixed；The web member is located between the Liang Yuliang of pontic, and is fixed with the web of beam, intersects web member and is fixed in crosspoint；It is described
Beam bottom steel plate is fixedly connected with beam bottom；The longeron is located on crossbeam, fixed floorings above longitudinal and cross beam.
2. the quick bridge widening structure of uninterrupted traffic according to claim 1, it is characterised in that：The bracket passes through
Bar planting is fixedly connected with girder, and smearing structure glue between the bracket and girder.
3. the quick bridge widening structure of uninterrupted traffic according to claim 1 or 2, it is characterised in that：The bracket
Between crossbeam, between the bracket and diagonal brace, by being welded and fixed between the diagonal brace and crossbeam.
4. the quick bridge widening structure of uninterrupted traffic according to claim 3, it is characterised in that：The web member passes through
Crab-bolt and end plate are fastened with web, intersect web member in crosspoint by being welded and fixed.
5. the quick bridge widening structure of uninterrupted traffic according to claim 4, it is characterised in that：Beam bottom steel plate
It is connected by bar planting with beam bottom, and the smearing structure glue between beam.
6. the quick bridge widening structure of uninterrupted traffic according to claim 5, it is characterised in that：The crossbeam, support
Frame, diagonal brace, web member and longeron use channel-section steel or i-steel component.
7. the installation method of the quick bridge widening structure of uninterrupted traffic described in claim 4, it is characterised in that including following
Step：
(1) preparation：Take down the old bridge anticollision barrier, and cut the part edge of a wing and mat formation；
(2) drill：Using impact drill in embedded crab-bolt and the position drilling of bar planting, powder in Kong Houyong compressed airs blowout hole is drilled
Dirt, then it is stained with absorbent cotton alcohol or acetone cleans hole inwall；
(3) bar planting：Anchoring adhesive is completely noted in hole, then crab-bolt and bar planting are unidirectionally screwed in；
(4) web member is installed：End plate is inserted in crab-bolt, nut is tightened and fixes, be then welded and fixed web member with end plate；
(5) affixing steel plate：Full coat structure glue, is inserted in bar planting between beam bottom steel plate and beam contact surface, tightens bolt and fixes；
(6) crossbeam and diagonal brace are installed：Bracket, crossbeam and diagonal brace are tightened together, by bracket and beam contact surface using being welded to connect
Between full coat structure glue, be inserted in bar planting, tighten bolt and fix, bracket bottom is fixed together by welding with beam bottom steel plate；
(7) longeron and floorings are installed.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916625A (en) * | 2017-12-25 | 2018-04-17 | 山西省交通规划勘察设计院 | A kind of widening structure and its method of width cantilever boxgirder |
| CN108385547A (en) * | 2018-02-07 | 2018-08-10 | 大连理工大学 | A kind of additional truss reinforcement means of arch bridge floorings |
| CN110735387A (en) * | 2019-11-04 | 2020-01-31 | 河南省交通规划设计研究院股份有限公司 | Transverse connection device for small box girders of bridge and construction method thereof |
| CN110804956A (en) * | 2019-09-26 | 2020-02-18 | 中国一冶集团有限公司 | Construction method for replacing special-shaped curve steel box girder support |
| CN112211116A (en) * | 2020-11-04 | 2021-01-12 | 广州北环高速公路有限公司 | T-shaped rigid frame bridge reinforcing structure and construction method thereof |
| CN113944112A (en) * | 2021-11-15 | 2022-01-18 | 广西科技大学 | Construction method for rebuilding and expanding bridge |
| CN114382019A (en) * | 2021-12-30 | 2022-04-22 | 浙江正方交通建设有限公司 | Active service T-beam bridge comprehensive reinforcement structure and construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003193419A (en) * | 2001-12-25 | 2003-07-09 | Sato Tekko Co Ltd | Reinforcing structure of steel truss bridge |
| CN101424075A (en) * | 2008-11-24 | 2009-05-06 | 重庆交通大学 | Concrete box girder bridge widening and reinforced structure and construction method thereof |
| CN104233963A (en) * | 2014-09-10 | 2014-12-24 | 北京工业大学 | Prestress-adjustable steel truss for reinforcing PSC (prestressed concrete) continuous box girder bridge and construction method |
| CN104372748A (en) * | 2014-11-15 | 2015-02-25 | 北京市政路桥股份有限公司 | Steel truss diaphragm for bridge broadening new-old bridge connecting |
| CN205975388U (en) * | 2016-07-18 | 2017-02-22 | 赵启林 | Bridge girder reinforcing device |
-
2017
- 2017-05-21 CN CN201710360368.2A patent/CN107100092B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003193419A (en) * | 2001-12-25 | 2003-07-09 | Sato Tekko Co Ltd | Reinforcing structure of steel truss bridge |
| CN101424075A (en) * | 2008-11-24 | 2009-05-06 | 重庆交通大学 | Concrete box girder bridge widening and reinforced structure and construction method thereof |
| CN104233963A (en) * | 2014-09-10 | 2014-12-24 | 北京工业大学 | Prestress-adjustable steel truss for reinforcing PSC (prestressed concrete) continuous box girder bridge and construction method |
| CN104372748A (en) * | 2014-11-15 | 2015-02-25 | 北京市政路桥股份有限公司 | Steel truss diaphragm for bridge broadening new-old bridge connecting |
| CN205975388U (en) * | 2016-07-18 | 2017-02-22 | 赵启林 | Bridge girder reinforcing device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916625A (en) * | 2017-12-25 | 2018-04-17 | 山西省交通规划勘察设计院 | A kind of widening structure and its method of width cantilever boxgirder |
| CN107916625B (en) * | 2017-12-25 | 2023-05-05 | 山西省交通规划勘察设计院有限公司 | Widening structure and method for wide cantilever box girder |
| CN108385547A (en) * | 2018-02-07 | 2018-08-10 | 大连理工大学 | A kind of additional truss reinforcement means of arch bridge floorings |
| CN110804956A (en) * | 2019-09-26 | 2020-02-18 | 中国一冶集团有限公司 | Construction method for replacing special-shaped curve steel box girder support |
| CN110804956B (en) * | 2019-09-26 | 2021-10-01 | 中国一冶集团有限公司 | Construction method for replacing special-shaped curve steel box girder support |
| CN110735387A (en) * | 2019-11-04 | 2020-01-31 | 河南省交通规划设计研究院股份有限公司 | Transverse connection device for small box girders of bridge and construction method thereof |
| CN112211116A (en) * | 2020-11-04 | 2021-01-12 | 广州北环高速公路有限公司 | T-shaped rigid frame bridge reinforcing structure and construction method thereof |
| CN113944112A (en) * | 2021-11-15 | 2022-01-18 | 广西科技大学 | Construction method for rebuilding and expanding bridge |
| CN114382019A (en) * | 2021-12-30 | 2022-04-22 | 浙江正方交通建设有限公司 | Active service T-beam bridge comprehensive reinforcement structure and construction method |
| CN114382019B (en) * | 2021-12-30 | 2024-05-24 | 浙江正方交通建设有限公司 | Active T-beam bridge comprehensive reinforcement structure and construction method |
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